[dpdk-dev] net/mlx: fix compile errors with ignore pedantic pragma

  With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
debug enabled produces lots of errors complaining that "pedantic" is
not a warning level that can be ignored.

error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
 #pragma GCC diagnostic ignored "-pedantic"
                                 ^~~~~~~~~~~

These errors can be removed by changing the "-pedantic" to "-Wpedantic".

Fixes: 7fae69eeff13 ("mlx4: new poll mode driver")
Fixes: 771fa900b73a ("mlx5: introduce new driver for Mellanox ConnectX-4 adapters")

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/net/mlx4/mlx4.c         | 8 ++++----
 drivers/net/mlx5/mlx5.c         | 8 ++++----
 drivers/net/mlx5/mlx5.h         | 8 ++++----
 drivers/net/mlx5/mlx5_ethdev.c  | 4 ++--
 drivers/net/mlx5/mlx5_fdir.c    | 8 ++++----
 drivers/net/mlx5/mlx5_mac.c     | 8 ++++----
 drivers/net/mlx5/mlx5_mr.c      | 8 ++++----
 drivers/net/mlx5/mlx5_prm.h     | 4 ++--
 drivers/net/mlx5/mlx5_rss.c     | 8 ++++----
 drivers/net/mlx5/mlx5_rxmode.c  | 8 ++++----
 drivers/net/mlx5/mlx5_rxq.c     | 8 ++++----
 drivers/net/mlx5/mlx5_rxtx.c    | 8 ++++----
 drivers/net/mlx5/mlx5_rxtx.h    | 8 ++++----
 drivers/net/mlx5/mlx5_stats.c   | 4 ++--
 drivers/net/mlx5/mlx5_trigger.c | 4 ++--
 drivers/net/mlx5/mlx5_txq.c     | 8 ++++----
 drivers/net/mlx5/mlx5_vlan.c    | 4 ++--
 17 files changed, 58 insertions(+), 58 deletions(-)
  

Hi Bruce,

On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
> debug enabled produces lots of errors complaining that "pedantic" is
> not a warning level that can be ignored.
> 
> error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
>  #pragma GCC diagnostic ignored "-pedantic"
>                                  ^~~~~~~~~~~
> 
> These errors can be removed by changing the "-pedantic" to "-Wpedantic".

Nice to have a workaround, I thought they did not keep the option at all.
However after testing:

- It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
  "warning: unknown option after `#pragma GCC diagnostic' kind".

- GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
  -Wpedantic.

- GCC 6 can only supports -Wpedantic.

Note we're working toward removing the need for these #pragma in the first
place as soon as possible, however in the meantime I fear that checking the
GCC version is necessary.

> Fixes: 7fae69eeff13 ("mlx4: new poll mode driver")
> Fixes: 771fa900b73a ("mlx5: introduce new driver for Mellanox ConnectX-4 adapters")
> 
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
>  drivers/net/mlx4/mlx4.c         | 8 ++++----
>  drivers/net/mlx5/mlx5.c         | 8 ++++----
>  drivers/net/mlx5/mlx5.h         | 8 ++++----
>  drivers/net/mlx5/mlx5_ethdev.c  | 4 ++--
>  drivers/net/mlx5/mlx5_fdir.c    | 8 ++++----
>  drivers/net/mlx5/mlx5_mac.c     | 8 ++++----
>  drivers/net/mlx5/mlx5_mr.c      | 8 ++++----
>  drivers/net/mlx5/mlx5_prm.h     | 4 ++--
>  drivers/net/mlx5/mlx5_rss.c     | 8 ++++----
>  drivers/net/mlx5/mlx5_rxmode.c  | 8 ++++----
>  drivers/net/mlx5/mlx5_rxq.c     | 8 ++++----
>  drivers/net/mlx5/mlx5_rxtx.c    | 8 ++++----
>  drivers/net/mlx5/mlx5_rxtx.h    | 8 ++++----
>  drivers/net/mlx5/mlx5_stats.c   | 4 ++--
>  drivers/net/mlx5/mlx5_trigger.c | 4 ++--
>  drivers/net/mlx5/mlx5_txq.c     | 8 ++++----
>  drivers/net/mlx5/mlx5_vlan.c    | 4 ++--
>  17 files changed, 58 insertions(+), 58 deletions(-)
> 
> diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
> index efe60cf..5bdeac9 100644
> --- a/drivers/net/mlx4/mlx4.c
> +++ b/drivers/net/mlx4/mlx4.c
> @@ -61,16 +61,16 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ether.h>
>  #include <rte_ethdev.h>
> @@ -87,7 +87,7 @@
>  #include <rte_alarm.h>
>  #include <rte_memory.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* Generated configuration header. */
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
> index 7264968..1a0a2be 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -43,16 +43,16 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_malloc.h>
>  #include <rte_ethdev.h>
> @@ -60,7 +60,7 @@
>  #include <rte_common.h>
>  #include <rte_kvargs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
> index 3a86609..65241a6 100644
> --- a/drivers/net/mlx5/mlx5.h
> +++ b/drivers/net/mlx5/mlx5.h
> @@ -43,16 +43,16 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ether.h>
>  #include <rte_ethdev.h>
> @@ -60,7 +60,7 @@
>  #include <rte_interrupts.h>
>  #include <rte_errno.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5_utils.h"
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
> index 130e15d..17588a5 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -50,7 +50,7 @@
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_atomic.h>
>  #include <rte_ethdev.h>
> @@ -60,7 +60,7 @@
>  #include <rte_alarm.h>
>  #include <rte_malloc.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_fdir.c b/drivers/net/mlx5/mlx5_fdir.c
> index 73eb00e..070edde 100644
> --- a/drivers/net/mlx5/mlx5_fdir.c
> +++ b/drivers/net/mlx5/mlx5_fdir.c
> @@ -40,23 +40,23 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ether.h>
>  #include <rte_malloc.h>
>  #include <rte_ethdev.h>
>  #include <rte_common.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_mac.c b/drivers/net/mlx5/mlx5_mac.c
> index f6b27bb..4fcfd3b 100644
> --- a/drivers/net/mlx5/mlx5_mac.c
> +++ b/drivers/net/mlx5/mlx5_mac.c
> @@ -44,22 +44,22 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ether.h>
>  #include <rte_ethdev.h>
>  #include <rte_common.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_mr.c b/drivers/net/mlx5/mlx5_mr.c
> index 67dfefa..0a36384 100644
> --- a/drivers/net/mlx5/mlx5_mr.c
> +++ b/drivers/net/mlx5/mlx5_mr.c
> @@ -34,20 +34,20 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_mempool.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_prm.h b/drivers/net/mlx5/mlx5_prm.h
> index 5db219b..4383009 100644
> --- a/drivers/net/mlx5/mlx5_prm.h
> +++ b/drivers/net/mlx5/mlx5_prm.h
> @@ -37,11 +37,11 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/mlx5_hw.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* Get CQE owner bit. */
> diff --git a/drivers/net/mlx5/mlx5_rss.c b/drivers/net/mlx5/mlx5_rss.c
> index 639e935..0bed74e 100644
> --- a/drivers/net/mlx5/mlx5_rss.c
> +++ b/drivers/net/mlx5/mlx5_rss.c
> @@ -40,21 +40,21 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_malloc.h>
>  #include <rte_ethdev.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_rxmode.c b/drivers/net/mlx5/mlx5_rxmode.c
> index 8b58555..173e6e8 100644
> --- a/drivers/net/mlx5/mlx5_rxmode.c
> +++ b/drivers/net/mlx5/mlx5_rxmode.c
> @@ -38,20 +38,20 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ethdev.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
> index 29c137c..99027d2 100644
> --- a/drivers/net/mlx5/mlx5_rxq.c
> +++ b/drivers/net/mlx5/mlx5_rxq.c
> @@ -40,25 +40,25 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #include <infiniband/arch.h>
>  #include <infiniband/mlx5_hw.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_mbuf.h>
>  #include <rte_malloc.h>
>  #include <rte_ethdev.h>
>  #include <rte_common.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
> index fce3381..a13cbc7 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.c
> +++ b/drivers/net/mlx5/mlx5_rxtx.c
> @@ -39,18 +39,18 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #include <infiniband/mlx5_hw.h>
>  #include <infiniband/arch.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_mbuf.h>
>  #include <rte_mempool.h>
> @@ -59,7 +59,7 @@
>  #include <rte_branch_prediction.h>
>  #include <rte_ether.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
> index f6e2cba..952f88c 100644
> --- a/drivers/net/mlx5/mlx5_rxtx.h
> +++ b/drivers/net/mlx5/mlx5_rxtx.h
> @@ -40,22 +40,22 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #include <infiniband/mlx5_hw.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_mbuf.h>
>  #include <rte_mempool.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5_utils.h"
> diff --git a/drivers/net/mlx5/mlx5_stats.c b/drivers/net/mlx5/mlx5_stats.c
> index 2d3cb51..f2b5781 100644
> --- a/drivers/net/mlx5/mlx5_stats.c
> +++ b/drivers/net/mlx5/mlx5_stats.c
> @@ -33,11 +33,11 @@
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ethdev.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
> index e9b9a29..d4dccd8 100644
> --- a/drivers/net/mlx5/mlx5_trigger.c
> +++ b/drivers/net/mlx5/mlx5_trigger.c
> @@ -33,14 +33,14 @@
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ether.h>
>  #include <rte_ethdev.h>
>  #include <rte_interrupts.h>
>  #include <rte_alarm.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5.h"
> diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
> index 6fe61c4..476ce79 100644
> --- a/drivers/net/mlx5/mlx5_txq.c
> +++ b/drivers/net/mlx5/mlx5_txq.c
> @@ -40,23 +40,23 @@
>  /* Verbs header. */
>  /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <infiniband/verbs.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_mbuf.h>
>  #include <rte_malloc.h>
>  #include <rte_ethdev.h>
>  #include <rte_common.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5_utils.h"
> diff --git a/drivers/net/mlx5/mlx5_vlan.c b/drivers/net/mlx5/mlx5_vlan.c
> index 4719e69..64e599d 100644
> --- a/drivers/net/mlx5/mlx5_vlan.c
> +++ b/drivers/net/mlx5/mlx5_vlan.c
> @@ -38,12 +38,12 @@
>  
>  /* DPDK headers don't like -pedantic. */
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> +#pragma GCC diagnostic ignored "-Wpedantic"
>  #endif
>  #include <rte_ethdev.h>
>  #include <rte_common.h>
>  #ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> +#pragma GCC diagnostic error "-Wpedantic"
>  #endif
>  
>  #include "mlx5_utils.h"
> -- 
> 2.7.4
>
  

On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
> Hi Bruce,
> 
> On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> > With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
> > debug enabled produces lots of errors complaining that "pedantic" is
> > not a warning level that can be ignored.
> > 
> > error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
> >  #pragma GCC diagnostic ignored "-pedantic"
> >                                  ^~~~~~~~~~~
> > 
> > These errors can be removed by changing the "-pedantic" to "-Wpedantic".
> 
> Nice to have a workaround, I thought they did not keep the option at all.
> However after testing:
> 
> - It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
>   "warning: unknown option after `#pragma GCC diagnostic' kind".
> 
> - GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
>   -Wpedantic.
> 
> - GCC 6 can only supports -Wpedantic.
> 
> Note we're working toward removing the need for these #pragma in the first
> place as soon as possible, however in the meantime I fear that checking the
> GCC version is necessary.
> 
Depends on how old of GCC version we need to support. From the release notes
it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).

https://gcc.gnu.org/gcc-4.8/changes.html

Do we need to support compilation on gcc versions older than this?

Regards,
/Bruce
  

On Mon, Sep 19, 2016 at 04:26:05PM +0100, Bruce Richardson wrote:
> On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
> > Hi Bruce,
> > 
> > On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> > > With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
> > > debug enabled produces lots of errors complaining that "pedantic" is
> > > not a warning level that can be ignored.
> > > 
> > > error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
> > >  #pragma GCC diagnostic ignored "-pedantic"
> > >                                  ^~~~~~~~~~~
> > > 
> > > These errors can be removed by changing the "-pedantic" to "-Wpedantic".
> > 
> > Nice to have a workaround, I thought they did not keep the option at all.
> > However after testing:
> > 
> > - It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
> >   "warning: unknown option after `#pragma GCC diagnostic' kind".
> > 
> > - GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
> >   -Wpedantic.
> > 
> > - GCC 6 can only supports -Wpedantic.
> > 
> > Note we're working toward removing the need for these #pragma in the first
> > place as soon as possible, however in the meantime I fear that checking the
> > GCC version is necessary.
> > 
> Depends on how old of GCC version we need to support. From the release notes
> it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).
> 
> https://gcc.gnu.org/gcc-4.8/changes.html
> 
> Do we need to support compilation on gcc versions older than this?

I'm all for upgrading so I do not really mind if we stop caring about older
GCC versions (especially considering this problem only occurs in debugging
mode which is seldom used by non-developers). The version check is necessary
if we want to keep full compatibility with at least:

- RHEL <= 6.x
- Debian <= 7.x
- Ubuntu <= 13.04

Works for me either way, thus:

Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
  

On Tue, Sep 20, 2016 at 02:51:27PM +0200, Adrien Mazarguil wrote:
> On Mon, Sep 19, 2016 at 04:26:05PM +0100, Bruce Richardson wrote:
> > On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
> > > Hi Bruce,
> > > 
> > > On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> > > > With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
> > > > debug enabled produces lots of errors complaining that "pedantic" is
> > > > not a warning level that can be ignored.
> > > > 
> > > > error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
> > > >  #pragma GCC diagnostic ignored "-pedantic"
> > > >                                  ^~~~~~~~~~~
> > > > 
> > > > These errors can be removed by changing the "-pedantic" to "-Wpedantic".
> > > 
> > > Nice to have a workaround, I thought they did not keep the option at all.
> > > However after testing:
> > > 
> > > - It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
> > >   "warning: unknown option after `#pragma GCC diagnostic' kind".
> > > 
> > > - GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
> > >   -Wpedantic.
> > > 
> > > - GCC 6 can only supports -Wpedantic.
> > > 
> > > Note we're working toward removing the need for these #pragma in the first
> > > place as soon as possible, however in the meantime I fear that checking the
> > > GCC version is necessary.
> > > 
> > Depends on how old of GCC version we need to support. From the release notes
> > it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).
> > 
> > https://gcc.gnu.org/gcc-4.8/changes.html
> > 
> > Do we need to support compilation on gcc versions older than this?
> 
> I'm all for upgrading so I do not really mind if we stop caring about older
> GCC versions (especially considering this problem only occurs in debugging
> mode which is seldom used by non-developers). The version check is necessary
> if we want to keep full compatibility with at least:
> 
> - RHEL <= 6.x
> - Debian <= 7.x
> - Ubuntu <= 13.04
> 
> Works for me either way, thus:
> 
> Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> 
Any objections to dropping of support for debug settings for these OS's?

/Bruce
  

On Tue, Sep 20, 2016 at 04:58:48PM +0100, Bruce Richardson wrote:
> On Tue, Sep 20, 2016 at 02:51:27PM +0200, Adrien Mazarguil wrote:
> > On Mon, Sep 19, 2016 at 04:26:05PM +0100, Bruce Richardson wrote:
> > > On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
> > > > Hi Bruce,
> > > > 
> > > > On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> > > > > With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
> > > > > debug enabled produces lots of errors complaining that "pedantic" is
> > > > > not a warning level that can be ignored.
> > > > > 
> > > > > error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
> > > > >  #pragma GCC diagnostic ignored "-pedantic"
> > > > >                                  ^~~~~~~~~~~
> > > > > 
> > > > > These errors can be removed by changing the "-pedantic" to "-Wpedantic".
> > > > 
> > > > Nice to have a workaround, I thought they did not keep the option at all.
> > > > However after testing:
> > > > 
> > > > - It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
> > > >   "warning: unknown option after `#pragma GCC diagnostic' kind".
> > > > 
> > > > - GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
> > > >   -Wpedantic.
> > > > 
> > > > - GCC 6 can only supports -Wpedantic.
> > > > 
> > > > Note we're working toward removing the need for these #pragma in the first
> > > > place as soon as possible, however in the meantime I fear that checking the
> > > > GCC version is necessary.
> > > > 
> > > Depends on how old of GCC version we need to support. From the release notes
> > > it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).
> > > 
> > > https://gcc.gnu.org/gcc-4.8/changes.html
> > > 
> > > Do we need to support compilation on gcc versions older than this?
> > 
> > I'm all for upgrading so I do not really mind if we stop caring about older
> > GCC versions (especially considering this problem only occurs in debugging
> > mode which is seldom used by non-developers). The version check is necessary
> > if we want to keep full compatibility with at least:
> > 
> > - RHEL <= 6.x
> > - Debian <= 7.x
> > - Ubuntu <= 13.04
> > 
> > Works for me either way, thus:
> > 
> > Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> > 
> Any objections to dropping of support for debug settings for these OS's?

Not sure who should answer this. These #pragma are workarounds we should
eventually get rid of anyway (DPDK headers are now clean enough, some work
remains to be done on the Verbs side) so let's use your patch in the
meantime.
  

----- Original Message -----
> On Tue, Sep 20, 2016 at 02:51:27PM +0200, Adrien Mazarguil wrote:
> > On Mon, Sep 19, 2016 at 04:26:05PM +0100, Bruce Richardson wrote:
> > > On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
> > > > Hi Bruce,
> > > > 
> > > > On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> > > > > With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers
> > > > > with
> > > > > debug enabled produces lots of errors complaining that "pedantic" is
> > > > > not a warning level that can be ignored.
> > > > > 
> > > > > error: ‘-pedantic’ is not an option that controls warnings
> > > > > [-Werror=pragmas]
> > > > >  #pragma GCC diagnostic ignored "-pedantic"
> > > > >                                  ^~~~~~~~~~~
> > > > > 
> > > > > These errors can be removed by changing the "-pedantic" to
> > > > > "-Wpedantic".
> > > > 
> > > > Nice to have a workaround, I thought they did not keep the option at
> > > > all.
> > > > However after testing:
> > > > 
> > > > - It does not seem to work with GCC 4.6 and older, they prefer
> > > > -pedantic:
> > > >   "warning: unknown option after `#pragma GCC diagnostic' kind".
> > > > 
> > > > - GCC 4.9 (possibly 5.x as well) does not care, can use either
> > > > -pedantic or
> > > >   -Wpedantic.
> > > > 
> > > > - GCC 6 can only supports -Wpedantic.
> > > > 
> > > > Note we're working toward removing the need for these #pragma in the
> > > > first
> > > > place as soon as possible, however in the meantime I fear that checking
> > > > the
> > > > GCC version is necessary.
> > > > 
> > > Depends on how old of GCC version we need to support. From the release
> > > notes
> > > it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).
> > > 
> > > https://gcc.gnu.org/gcc-4.8/changes.html
> > > 
> > > Do we need to support compilation on gcc versions older than this?
> > 
> > I'm all for upgrading so I do not really mind if we stop caring about older
> > GCC versions (especially considering this problem only occurs in debugging
> > mode which is seldom used by non-developers). The version check is
> > necessary
> > if we want to keep full compatibility with at least:
> > 
> > - RHEL <= 6.x
> > - Debian <= 7.x
> > - Ubuntu <= 13.04
> > 
> > Works for me either way, thus:
> > 
> > Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> > 
> Any objections to dropping of support for debug settings for these OS's?

No objections on dropping RHEL <= 6 support, we never did DPDK on those old
versions anyway.

As for the others, I've no particular opinion but certainly no objections
either.

   - Panu -

> 
> /Bruce
>
  

On Tue, Sep 20, 2016 at 02:51:27PM +0200, Adrien Mazarguil wrote:
> On Mon, Sep 19, 2016 at 04:26:05PM +0100, Bruce Richardson wrote:
> > On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
> > > Hi Bruce,
> > > 
> > > On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
> > > > With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
> > > > debug enabled produces lots of errors complaining that "pedantic" is
> > > > not a warning level that can be ignored.
> > > > 
> > > > error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
> > > >  #pragma GCC diagnostic ignored "-pedantic"
> > > >                                  ^~~~~~~~~~~
> > > > 
> > > > These errors can be removed by changing the "-pedantic" to "-Wpedantic".
> > > 
> > > Nice to have a workaround, I thought they did not keep the option at all.
> > > However after testing:
> > > 
> > > - It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
> > >   "warning: unknown option after `#pragma GCC diagnostic' kind".
> > > 
> > > - GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
> > >   -Wpedantic.
> > > 
> > > - GCC 6 can only supports -Wpedantic.
> > > 
> > > Note we're working toward removing the need for these #pragma in the first
> > > place as soon as possible, however in the meantime I fear that checking the
> > > GCC version is necessary.
> > > 
> > Depends on how old of GCC version we need to support. From the release notes
> > it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).
> > 
> > https://gcc.gnu.org/gcc-4.8/changes.html
> > 
> > Do we need to support compilation on gcc versions older than this?
> 
> I'm all for upgrading so I do not really mind if we stop caring about older
> GCC versions (especially considering this problem only occurs in debugging
> mode which is seldom used by non-developers). The version check is necessary
> if we want to keep full compatibility with at least:
> 
> - RHEL <= 6.x
> - Debian <= 7.x
> - Ubuntu <= 13.04
> 
> Works for me either way, thus:
> 
> Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
> 
Applied to dpdk-next-net/rel_16_11

/Bruce
  

On 9/20/2016 7:17 PM, Adrien Mazarguil wrote:
> On Tue, Sep 20, 2016 at 04:58:48PM +0100, Bruce Richardson wrote:
>> On Tue, Sep 20, 2016 at 02:51:27PM +0200, Adrien Mazarguil wrote:
>>> On Mon, Sep 19, 2016 at 04:26:05PM +0100, Bruce Richardson wrote:
>>>> On Mon, Sep 19, 2016 at 04:59:59PM +0200, Adrien Mazarguil wrote:
>>>>> Hi Bruce,
>>>>>
>>>>> On Mon, Sep 19, 2016 at 03:36:54PM +0100, Bruce Richardson wrote:
>>>>>> With recent gcc versions, e.g. gcc 6.1, compilation of mlx drivers with
>>>>>> debug enabled produces lots of errors complaining that "pedantic" is
>>>>>> not a warning level that can be ignored.
>>>>>>
>>>>>> error: ‘-pedantic’ is not an option that controls warnings [-Werror=pragmas]
>>>>>>  #pragma GCC diagnostic ignored "-pedantic"
>>>>>>                                  ^~~~~~~~~~~
>>>>>>
>>>>>> These errors can be removed by changing the "-pedantic" to "-Wpedantic".
>>>>>
>>>>> Nice to have a workaround, I thought they did not keep the option at all.
>>>>> However after testing:
>>>>>
>>>>> - It does not seem to work with GCC 4.6 and older, they prefer -pedantic:
>>>>>   "warning: unknown option after `#pragma GCC diagnostic' kind".
>>>>>
>>>>> - GCC 4.9 (possibly 5.x as well) does not care, can use either -pedantic or
>>>>>   -Wpedantic.
>>>>>
>>>>> - GCC 6 can only supports -Wpedantic.
>>>>>
>>>>> Note we're working toward removing the need for these #pragma in the first
>>>>> place as soon as possible, however in the meantime I fear that checking the
>>>>> GCC version is necessary.
>>>>>
>>>> Depends on how old of GCC version we need to support. From the release notes
>>>> it appears that -Wpedantic was introduced in GCC 4.8 (3 1/2 years ago).
>>>>
>>>> https://gcc.gnu.org/gcc-4.8/changes.html
>>>>
>>>> Do we need to support compilation on gcc versions older than this?
>>>
>>> I'm all for upgrading so I do not really mind if we stop caring about older
>>> GCC versions (especially considering this problem only occurs in debugging
>>> mode which is seldom used by non-developers). The version check is necessary
>>> if we want to keep full compatibility with at least:
>>>
>>> - RHEL <= 6.x
>>> - Debian <= 7.x
>>> - Ubuntu <= 13.04
>>>
>>> Works for me either way, thus:
>>>
>>> Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
>>>
>> Any objections to dropping of support for debug settings for these OS's?
> 
> Not sure who should answer this. These #pragma are workarounds we should
> eventually get rid of anyway (DPDK headers are now clean enough, some work
> remains to be done on the Verbs side) so let's use your patch in the
> meantime.
> 

Just as a quick note, this breaks compilation for ICC:

.../drivers/net/mlx4/mlx4.c(64): error #2282: unrecognized GCC pragma
  #pragma GCC diagnostic ignored "-Wpedantic"

Since this compilation error only happens for MLX4/5 when debug config
option enabled, this not big issue, but please aware of the issue.

Thanks,
ferruh